Directional Coupler
50Ω
Maximum Ratings
Operating Temperature
Storage Temperature
-55°C to 100°C
-55°C to 100°C
Coaxial
ZFDC-10-21
1 to 1000 MHz
Features
• wideband, 1 to 1000 MHz
• excellent directivity, 25 dB typ.
• rugged shielded case
BNC version shown
CASE STYLE: K18
Connectors Model
BNC
ZFDC-10-21
SMA
ZFDC-10-21-S
N-TYPE
ZFDC-10-21-N
BRACKET (OPTION"B")
Price
$54.95
$59.95
$59.95
$2.50
Qty.
(1-9)
(1-9)
(1-9)
(1+)
Coaxial Connections
INPUT
OUTPUT
COUPLED
1
2
3
Applications
• VHF/UHF
• cellular
• instrumentation
• communications receivers & transmitters
Directional Coupler Electrical Specifications
Outline Drawing
FREQ.
RANGE
(MHz)
f
L
-f
U
1-1000
COUPLING*
(dB)
L
Nom.
11±0.5
Flatness
±0.5
MAINLINE LOSS
1
(dB)
M
U
L
DIRECTIVITY
(dB)
M
Min.
30
Typ.
25
Min.
20
Typ.
25
U
Min.
20
VSWR
(:1)
POWER
INPUT
(W)
L
MU
Max.
2.0
Max.
1.0
Typ. Max. Typ. Max. Typ. Max. Typ.
1.2
2.1
1.2
1.7
1.6
2.0
40
Typ.
1.2
L = low range [f
L
to 10 f
L
]
M = mid range [10 f
L
to f
U
/2]
U= upper range [f
U
/2 to f
U
]
1. Mainline loss includes theoretical power loss at coupled port.
* Upper range coupling flatness
±0.75
dB
Typical Performance Data
Frequency
(MHz)
1.00
5.00
9.00
127.00
283.00
H
1.000
25.40
Mainline Loss
(dB)
In-Out
1.40
1.10
1.06
1.09
1.13
1.15
1.32
1.38
1.48
1.70
Coupling
(dB)
In-Cpl
11.11
10.69
10.64
10.63
10.67
10.67
10.77
10.77
10.76
10.84
Directivity
(dB)
57.10
57.53
58.41
53.14
41.08
34.18
31.02
27.90
24.75
23.41
In
19.66
29.35
33.22
35.93
33.11
32.39
32.13
29.33
23.76
20.67
Return Loss
(dB)
Out
15.47
18.65
19.11
19.06
18.61
17.97
17.66
17.37
17.46
17.70
Cpl
14.40
17.89
18.54
18.61
17.79
16.96
16.67
16.50
17.00
17.66
Outline Dimensions (
inch
)
mm
A
1.25
31.75
B
1.25
31.75
C
.75
19.05
D
.63
16.00
E
.38
9.65
F
1.00
25.40
G
.125
3.18
J
--
--
K
--
--
L
.125
3.18
M
1.688
42.88
N
2.18
55.37
P
.75
19.05
Q
wt
.07 grams
70.0
1.78
440.00
540.00
678.00
873.00
1000.00
ZFDC-10-21
MAINLINE LOSS
2.0
MAINLINE LOSS (dB)
1.6
1.2
0.8
0.4
0.0
1
10
100
FREQUENCY (MHz)
1000
at RF level of -10 dBm
ZFDC-10-21
COUPLING & DIRECTIVITY
100
COUPLING & DIRECTIVITY
(dB)
80
60
40
20
0
0
200
400
600
FREQUENCY (MHz)
800
1000
at RF level of -10 dBm
COUPLING
DIRECTIVITY
ZFDC-10-21
RETURN LOSS
50
RETURN LOSS (dB)
42
34
26
18
10
1
10
100
1000
FREQUENCY (MHz)
at RF level of -10 dBm
electrical schematic
CPL
IN
OUT
Mini-Circuits
ISO 9001 ISO 14001
CERTIFIED
RF/IF MICROWAVE COMPONENTS
®
minicircuits.com
REV. OR
M93827
ZFDC-10-21
WZ/TD/CP
070315
EW
ALL N
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 For detailed performance specs & shopping online see Mini-Circuits web site
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